diff -r 5019e3e93a4e -r b329573c76d7 java/copy-image-resizer/src/cz/frantovo/copyImageResizer/RecursiveImageResizer.java
--- a/java/copy-image-resizer/src/cz/frantovo/copyImageResizer/RecursiveImageResizer.java	Sun Nov 16 23:47:28 2014 +0100
+++ b/java/copy-image-resizer/src/cz/frantovo/copyImageResizer/RecursiveImageResizer.java	Mon Nov 17 01:17:02 2014 +0100
@@ -17,13 +17,69 @@
  */
 package cz.frantovo.copyImageResizer;
 
+import cz.frantovo.copyImageResizer.SingleImageResizer.ImageFormat;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
 /**
  *
  * @author Ing. František Kučera (frantovo.cz)
  */
 public class RecursiveImageResizer {
 
+	private static final Logger log = Logger.getLogger(RecursiveImageResizer.class.getName());
+
+	private final SingleImageResizer resizer = new SingleImageResizer();
+
 	public void resize(RecursiveOptions options) throws RecursiveException, ResizeException {
+		resizeDirectory(options.getInput(), options);
+	}
+
+	private void resizeFile(File file, RecursiveOptions options) throws ResizeException {
+		log.log(Level.FINE, "Resizing file: {0}", relativize(options.getInput(), file));
+
+		ImageFormat format = ImageFormat.getMatching(file.getName());
+
+		if (format == null) {
+			log.log(Level.FINE, "Skipping file: {0} (no image format matched this extension)", relativize(options.getInput(), file));
+		} else {
+			try {
+				FileInputStream input = new FileInputStream(file);
+				File relative = relativize(options.getInput(), file);
+				File outputFile = new File(options.getOutput(), relative.getPath());
+				FileOutputStream output = new FileOutputStream(outputFile);
+				resizer.resize(input, output, format);
+			} catch (FileNotFoundException e) {
+				throw new ResizeException("Error while opening stream", e);
+			}
+		}
+
+	}
+
+	private void resizeDirectory(File directory, RecursiveOptions options) throws ResizeException {
+
+		log.log(Level.FINE, "Resizing directory: {0}", directory);
+
+		File relative = relativize(options.getInput(), directory);
+		File output = new File(options.getOutput(), relative.getPath());
+		output.mkdirs();
+
+		for (File entry : directory.listFiles()) {
+			if (entry.isDirectory()) {
+				resizeDirectory(entry, options);
+			} else {
+				resizeFile(entry, options);
+			}
+		}
+
+	}
+
+	private static File relativize(File root, File child) {
+		return root.toPath().relativize(child.toPath()).toFile();
 	}
 
 }